Disney Publishing Worldwide has announced that the final book in Eoin Colfer's bestselling children's series, Artemis Fowl, will go to press for 1 million copies. The Last Guardian, which is the eighth book in the line, will be published on July 10, in both hardcover and digital, by Disney's Hyperion imprint. According to the company, there are over 13 million Artemis Fowl books in print in the U.S. alone.